Does Liquibase log in for each changeset?

I am using Liquibase with Oracle DB with audit logging. I can notice that when running liquibase it is inserting a lot (tens of thousands) of transactions to the sys.audit$ saying that a user has logged in and logged out.


So my question is:
Does liquibase open up a new connection for each commit?

Or does liquibase open up a new connection for each changeset? 


Thanks in advance.